A person will no longer be able to change to Student Status (F-1) while in the US unless they inform the US Airport/Border Inspector of the possible plan to attend school here. It is probably better for person to apply for a student visa at a US consulate or inform the consul that they might want to go to school so the visit visa can be marked "Potential Student"
Nationals of Islamic and Arabic nations are being especially questioned by US consuls regarding their background and the reasons for coming to or being in the US.
In the past, Border and Airport Inspectors have had discretion to excuse or forgive technical errors in visas or passports. For example, a person who had an H-1B work petition approved, departed from the US then came back without obtaining the correct H-1B visa was generally allowed to enter with a visit visa since it was considered to be a minor problem. Now the Inspectors no longer have this discretion. Applicants for entry with even minor visa problems are being taken into custody and immediately Removed from the US. This includes H-1B, L-1, E, and P status applicants. These business related visas had been given the benefit of the doubt in the past. Not any more. Applicants must be sure to have the exact, correct visa when arriving in the US else they could be on the next plane back home.